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Update: Cross passage construction near Conway Crescent, Perivale

Work item: HS2-SCS-25-1221

Work Item Summary

Project Phase
Phase 1
Region
Brent and Ealing
Location
Conway Crescent, Perivale
Worksite Name
Green Park Way Vent Shaft site
Contractor
SCS JV
Type of works
Cross passage construction
Estimated Start Date
15/09/2025
Estimated End Date
29/09/2025

What we are doing

We’re building cross passages between the railways tunnels to allow HS2 passengers to get to a place of safety in an emergency. They are about every 500 meters on the tunnels route.

We wrote to you in August 2025 about cross passage 14 works taking place from 1 September to 22 September 2025 near Conway Crescent, Perivale.
These works are now expected to take place from 15 September to 29 September 2025.

To build the cross passage, we will break into the side of the completed tunnel. This might cause some noise and vibration, which may be heard or felt as ground borne noise in nearby buildings. We’ll work 24 hours, seven days a week. To avoid overnight disturbance, we’ll limit noisy activities to between 7am to 10pm Monday to Sunday and carry out quieter works at night.

Cross passage 14 is about 26 metres below ground and lies within a thick layer of London clay, which will reduce noise and vibration during these works.

Download information relating to these works

Find out more about

If you have a question about HS2 or our works, please contact our HS2 Helpdesk team on 08081 434 434 or email [email protected]